Free Online Firebird 4.0 (Employee) Playground: Practice & Master SQL Skills

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WITH RECURSIVE employee_hierarchy (emp_no, dept_no) AS ( -- Начинаем с Роберта Нельсона SELECT e.EMP_NO, e.DEPT_NO FROM EMPLOYEE e WHERE e.FIRST_NAME = 'Robert' AND e.LAST_NAME = 'Nelson' UNION ALL -- Рекурсивно добавляем подчиненных SELECT e.EMP_NO, e.DEPT_NO FROM EMPLOYEE e JOIN employee_hierarchy eh ON e.MANAGER_NO = eh.EMP_NO ) SELECT DISTINCT d.DEPT_NO, d.DEPT_NAME FROM employee_hierarchy eh JOIN DEPARTMENT d ON eh.dept_no = d.DEPT_NO; ; SELECT 'Last_query_cost' AS "Variable_name", 0 AS "Value" FROM RDB$DATABASE;

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